Hydrophobized mouth mirror and preparation method thereof

Abstract

The invention discloses a hydrophobic odontoscope and a preparation method thereof. The odontoscope comprises an odontoscope base body and a polysiloxane coating modified on the odontoscope base body. According to the method, the odontoscope is modified with siloxane with terminal reactive groups through a wiping method, rapid hydrophobic modification is conducted on the surface of the odontoscope, the surface of the odontoscope can have obvious dynamic repellency on blood liquid drops, and therefore bloodstains can rapidly slip off from the surface of the odontoscope without residues. Meanwhile, due to the lubrication effect of similar liquid, water can easily slide on the surface of the mouth mirror which has an inclined angle and is subjected to hydrophobization modification, and no adhesion phenomenon exists; compared with an unmodified odontoscope, the siloxane with the terminal reactive group is grafted and modified on the surface of the odontoscope, so that water drops can be quickly removed, and the amount of accumulated water on the surface of the odontoscope is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of engineering technology (materials), and relates to a hydrophobic mouth mirror and a preparation method thereof, specifically to an improved mirror surface mouth mirror, so as to reduce the mirror surface pollution of the mouth mirror by water vapor and other substances, thereby maintaining a good field of view and improving work efficiency. Background Art

[0002] As one of the most basic instruments in stomatology, the mouth mirror is an essential instrument for oral examination and treatment. The functions of the mouth mirror are firstly to reflect light and observe parts that the line of sight cannot directly reach, such as the lingual, palatal and distal surfaces of teeth. Secondly, it can converge light and reflect light as a mirror surface to the part to be examined to increase the local brightness. Thirdly, the mouth mirror can also pull soft tissues such as the lips, cheeks and tongue to facilitate examination or surgery.

[0003] The currently used mouth mirrors are divided into two categories. One is the ordinary mouth mirror (disposable mouth mirror), whose reflective interface is on the rear surface of the lens, and double reflection with the front surface glass is likely to form a ghost image. The other is the special microscope mouth mirror, which is a surface reflection mouth mirror, whose reflective interface is on the front surface of the lens, with good mirror image quality and no image distortion.

[0004] When the mouth mirror is used in the oral cavity, there is not only the interference of saliva, but also the water vapor ejected during the operation of the turbine or ultrasonic instrument will blur the mirror surface. At the same time, the tooth tissue abraded and the debris of filling materials during the treatment process will be splashed on the surface of the mouth mirror, thus causing pollution on the surface of the mouth mirror, and further having a great impact on the field of view of the mouth mirror. Whether the mouth mirror can provide a clear field of view plays a crucial role in the treatment. Therefore, during the treatment process, doctors need to spend a lot of time cleaning the mouth mirror, which greatly reduces work efficiency. Moreover, due to the unclear field of view of the mouth mirror, decision-making or operation mistakes may occur during the treatment process, resulting in irreversible damage to the patient's teeth.

[0005] The low-adhesion hydrophobic surface can effectively reduce the adhesion of droplets on the surface. By grafting a hydrophobic and flexible-chain polymer material onto the solid surface in the form of a polymer brush, a liquid-like polymer brush coating material is prepared, which is expected to solve the above problems. However, the use of a mouth mirror often requires simplicity and quickness. Therefore, how to achieve rapid hydrophobic and anti-fog modification of the mouth mirror without generating toxic substances has become an urgent technical problem in this field. Summary of the Invention

[0006] In order to improve the above technical problems, the present invention provides a mouth mirror, which includes a mouth mirror substrate and a polysiloxane coating modified on the mouth mirror substrate. Preferably, the polysiloxane coating is modified on the mouth mirror substrate through a terminal reactive group.

[0007] According to an embodiment of the present invention, the end - reactive groups of the polysiloxane coating are grafted onto the mouth mirror substrate by covalent bonds.

[0008] According to an embodiment of the present invention, the polysiloxane coating is prepared by a graft reaction of a siloxane having end - reactive groups on the mouth mirror substrate.

[0009] According to an embodiment of the present invention, the siloxane having end - reactive groups is selected from low - molecular - weight dichlorosilane bis - end - group silane monomers (such as at least one of dichlorodimethylsilane, 1,3 - dichlorotetramethyldisiloxane, and dimethoxydimethylsilane, etc.) or high - molecular - weight mono - end - group siloxanes (such as trimethoxy - terminated polysiloxane or vinyl - end - group polysiloxane, etc.).

[0010] According to an embodiment of the present invention, the weight - average molecular weight of the high - molecular - weight mono - end - group siloxane is 1000 - 100000, and examples are 1000, 3000, 5000, 8000, 10000, 20000, 50000, 100000.

[0011] According to an embodiment of the present invention, the thickness of the coating is 1 - 10 nm, preferably 3 - 10 nm, and an example is 7 nm.

[0012] According to an embodiment of the present invention, the mouth mirror is prepared by grafting a siloxane having end - reactive groups on the mouth mirror substrate to form a polysiloxane coating.

[0013] According to an embodiment of the present invention, the grafting method is: coating a solution containing a siloxane having end - reactive groups on the mouth mirror substrate. For example, the coating method can be brushing or wiping. Exemplarily, a brush, non - woven fabric, or lens - cleaning paper is soaked in a solution of a siloxane having end - reactive groups, and then the surface of the mouth mirror substrate is wiped with the brush, non - woven fabric, or lens - cleaning paper. Also, for example, the wiping time can be 15 - 120 s, and examples are 15 s, 30 s, 45 s, 60 s, 120 s.

[0014] According to an embodiment of the present invention, the concentration of the siloxane having end - reactive groups in the solution is 0.5 - 20 wt%, and examples are 0.5 wt%, 1 wt%, 2 wt%, 5 wt%, 8 wt%, 10 wt%, 20 wt%.

[0015] According to an embodiment of the present invention, the solution may further contain an acid catalyst. For example, the acid catalyst includes molecules that can generate hydrogen ions, such as at least one of hydrochloric acid, Lewis acid, and chlorosilane.

[0016] In one embodiment of the present invention, the acid catalyst may be the same as the siloxane having a terminal reactive group. For example, the acid catalyst may be dichlorodimethylsilane, 1,3-dichlorotetramethyldisiloxane.

[0017] According to an embodiment of the present invention, the concentration of the acid catalyst in the solution is 0.1 to 5 wt%, exemplary being 0.1 wt%, 0.2 wt%, 0.5 wt%, 1 wt%, 2 wt%, 5 wt%.

[0018] According to an embodiment of the present invention, the solvent used in the solution is a low-toxic or non-toxic organic solvent, such as at least one of isopropanol, ethanol, ethylene glycol, etc.

[0019] The present invention also provides a method for preparing the above-mentioned mouth mirror, which includes modifying a solution containing a siloxane having a terminal reactive group on the mouth mirror substrate to obtain a mouth mirror with a polysiloxane coating on its surface.

[0020] According to an embodiment of the present invention, the modification method may be coating. For another example, the coating method may be brushing or wiping. Exemplarily, a brush, non-woven fabric or lens cleaning paper is immersed in a siloxane solution having a terminal reactive group, and then the surface of the mouth mirror substrate is wiped with the brush, non-woven fabric or lens cleaning paper. For another example, the wiping time may be 15 to 120 s, exemplary being 15 s, 30 s, 45 s, 60 s, 120 s.

[0021] According to an embodiment of the present invention, the solvent used in the solution is a low-toxic organic solvent, such as at least one of isopropanol, ethanol, ethylene glycol, etc.

[0022] According to an embodiment of the present invention, the concentration of the siloxane having a terminal reactive group in the solution is 0.5 to 20 wt%, exemplary being 0.5 wt%, 1 wt%, 2 wt%, 5 wt%, 8 wt%, 10 wt%, 20 wt%.

[0023] According to an embodiment of the present invention, the solution may further contain an acid catalyst. For example, the acid catalyst includes molecules that can generate hydrogen ions, such as at least one of hydrochloric acid, Lewis acid, and chlorosilane.

[0024] In one embodiment of the present invention, the acid catalyst may be the same as the siloxane having a terminal reactive group. For example, the acid catalyst may be dichlorodimethylsilane, 1,3-dichlorotetramethyldisiloxane.

[0025] According to an embodiment of the present invention, the concentration of the acid catalyst in the solution is 0.1 to 20 wt%, exemplary being 0.1 wt%, 0.2 wt%, 0.5 wt%, 1 wt%, 2 wt%, 5 wt%, 8 wt%, 10 wt%, 20 wt%.

[0026] According to an embodiment of the present invention, the method for preparing the oral mirror further includes washing and drying the surface of the oral mirror. For example, the solvent for washing is water.

[0027] Advantages of the present invention:

[0028] The high mobility of the molecular chains in the organosilicon-based liquid polymer brush enables it to exhibit self-lubricating properties without the need to introduce liquid lubricants. Due to its excellent waterproof performance and good chemical and mechanical stability, such materials have gradually become a new strategy for developing anti-fouling coating technologies. Specifically:

[0029] (1) The present invention provides a simple method for rapidly hydrophobizing the surface of an oral mirror by wiping. Due to the lubricating effect of the liquid-like substance, water easily slides on the hydrophobized surface of the oral mirror with an inclined angle without any adhesion phenomenon; and compared with the unmodified oral mirror, the present invention can achieve rapid removal of water droplets by grafting and modifying the oral mirror surface with siloxanes having terminal reactive groups, so as to reduce the water accumulation on the oral mirror surface.

[0030] (2) The present invention further studied the cleaning effect when there are stains on the surface of the oral mirror. Taking the complete flushing away of the stains as the standard, the amount of water used in the cleaning process of the oral mirror surface before and after modifying the oral mirror with siloxanes having terminal reactive groups was studied. The results show that the amount of water used can be significantly reduced during the stain cleaning process after modifying the oral mirror surface with siloxanes having terminal reactive groups.

[0031] (3) By modifying the oral mirror with siloxanes having terminal reactive groups, the present invention can make the surface of the oral mirror have obvious dynamic repellency to blood droplets, so that the blood stains can quickly slide off the oral mirror surface without residue. Description of the drawings

[0032] Figure 1 It is a schematic diagram of the preparation process of the oral mirror.

[0033] Figure 2 It is a hydrophobization effect diagram of water droplets on the surface of the unmodified oral mirror and the oral mirror prepared in Example 1.

[0034] Figure 3 It is a dynamic repellency performance diagram of 30 μl sheep red blood cell droplets on the surface of the unmodified oral mirror and the oral mirror prepared in Example 2.

[0035] Figure 4 It is a dynamic repellency performance diagram of 10 μl sheep red blood cell droplets on the surface of the unmodified oral mirror and the oral mirror prepared in Example 2.

[0036] Figure 5The mouth mirror hydrophobic coating prepared using Example 3 has good cleaning function and can achieve rapid removal of water droplets, reducing the amount of water on the surface area. Detailed implementation manners

[0037] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only for illustrative explanation of the present invention and should not be construed as limiting the protection scope of the present invention. All technologies implemented based on the above content of the present invention are covered within the scope of protection intended by the present invention.

[0038] Unless otherwise specified, the raw materials and reagents used in the following examples are all commercially available products or can be prepared by known methods.

[0039] Example 1

[0040] A preparation method of a mouth mirror, comprising the following steps:

[0041] Using polydimethylsiloxane with a single-terminal trimethoxy group and a weight-average molecular weight of 3000 as the main component, with a weight fraction of 5 parts, dichlorodimethylsilane (DCDMS) as an acid catalyst, with a weight fraction of 0.5 part, 100 parts of isopropanol, and ultrasonic mixing for 10 min to obtain a reaction solution. Dip the lens paper into the solution for 30 s and then wipe the mouth mirror for 1 - 2 min. After the solvent volatilizes, wipe it again with a clean lens paper until there is no liquid residue on the surface, obtaining a mouth mirror with a hydrophobic coating on the surface.

[0042] Drop 20 μl of water onto the surface of the unmodified mouth mirror and the surface of the mouth mirror prepared in Example 1 (hydrophobically treated mouth mirror surface) respectively, and observe the hydrophobic effect of the water droplets on the surface of the unmodified mouth mirror and the surface of the mouth mirror prepared in Example 1 (hydrophobically treated mouth mirror surface). The results are as Figure 2 shown. It can be seen from the figure that the water droplets can quickly slide off on the surface of the mouth mirror prepared in Example 1 (hydrophobically treated mouth mirror surface), while the flow rate of the water droplets is slower on the surface of the unmodified mouth mirror and there are obvious residues and pinning phenomena. This shows that by modifying the mouth mirror with siloxane having a terminal reactive group for hydrophobic modification, the mouth mirror can have excellent dynamic repellency performance to water.

[0043] Example 2

[0044] A preparation method of a mouth mirror, comprising the following steps:

[0045] Dissolve 5 parts of dichlorodimethylsilane (DCDMS) in 100 parts of ethanol, stir at 60 °C for 2 h to hydrolyze the dichlorodimethylsilane molecules, release hydrochloric acid, and autocatalyze the formation of a silicone-oxygen long chain with end groups. Immerse the non-woven fabric in the reaction solution, take it out after wetting, seal it, and keep it moist. When in use, take it out, wipe the mouth mirror for 1 min, wash the mouth mirror with water after the solvent has evaporated, and dry it with compressed air to obtain a mouth mirror with a hydrophobized coating on its surface.

[0046] Drop 30 μl of sheep red blood cell suspension (red blood cell concentration is 10 7 cells / ml) onto the surface of the unmodified mouth mirror and the mouth mirror prepared in Example 2 (hydrophobized mouth mirror surface) respectively, and observe the dynamic repulsion performance of the sheep red blood cell suspension on the surface of the unmodified mouth mirror and the mouth mirror prepared in Example 2 (hydrophobized mouth mirror surface). The results are as Figure 3 shown. It can be seen from the figure that: the sheep red blood cell suspension slides on the surface of the unmodified mouth mirror but has obvious residue; while on the mouth mirror surface prepared in Example 2 (hydrophobized mouth mirror surface), the suspension slides off without residue. This shows that the mouth mirror with a hydrophobized coating prepared by the present invention has obvious blood dynamic repulsion performance.

[0047] Drop 10 μl of sheep red blood cell suspension onto the surface of the unmodified mouth mirror and the mouth mirror prepared in Example 2 (hydrophobized treatment) respectively, and observe the dynamic repulsion performance of the sheep red blood cell suspension on the surface of the unmodified mouth mirror and the mouth mirror prepared in Example 2 (hydrophobized treatment). The results are as Figure 4 shown. It can be seen from the figure that: the sheep red blood cell suspension adheres to the surface of the unmodified mouth mirror and cannot slide; while on the mouth mirror surface prepared in Example 2 (hydrophobized treatment), the suspension slides off without residue within 3 s. This shows that the mouth mirror with a hydrophobized coating prepared by the present invention has obvious blood dynamic repulsion performance, can reduce the adhesion and pinning of blood on the mouth mirror surface, and thus can make the blood droplet slide off the surface quickly and without residue.

[0048] Example 3

[0049] A method for preparing a mouth mirror, comprising the following steps:

[0050] Dissolve 10 parts of dichlorodimethylsilane (DCDMS) in 1000 parts of ethylene glycol, add 1 part of water, rotate the solution at 3000 rpm for about 30 s, and let it stand for 5 min before use at room temperature. Brush the solution evenly onto the surface of the mouth mirror, wash the substrate with water after the solvent has evaporated, and dry it with compressed air to obtain a mouth mirror with a hydrophobized coating on its surface.

[0051] The surfaces of the unmodified mouth mirror and the mouth mirror prepared in Example 3 (hydrophobized mouth mirror surface) were rinsed with 10 μl of water respectively, and the water accumulation amounts of water droplets on the surfaces of the unmodified mouth mirror and the mouth mirror prepared in Example 3 (hydrophobized mouth mirror surface) were observed. The results are as Figure 5 shown. It can be seen from the figure that the water droplets slide on the surface of the unmodified mouth mirror but have obvious residues; while on the surface of the mouth mirror prepared in Example 3 (hydrophobized mouth mirror surface), the droplets slide off without residues. This shows that the mouth mirror with a hydrophobized coating on the surface prepared by the present invention has obvious dynamic repelling performance to water, can reduce the adhesion and pinning of water on the surface of the mouth mirror. Therefore, the water droplets can slide off the surface quickly and without residues, and further make the mouth mirror have good cleaning performance. Thus, when there are foreign matters on the surface of the mouth mirror, a small amount of water can be used for cleaning, and the water accumulation amount on the surface can be greatly reduced.

[0052] The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An oral mirror, characterized in that, The oral mirror includes an oral mirror substrate and a polysiloxane coating modified on the oral mirror substrate.

2. The mouth mirror according to claim 1, wherein The polysiloxane coating is modified on the oral mirror substrate through end-reactive groups. Preferably, the end-reactive groups of the polysiloxane coating are grafted onto the oral mirror substrate through covalent bonds.

3. The mouth mirror according to claim 1 or 2, characterized in that, The polysiloxane coating is prepared by grafting reaction of siloxanes with end-reactive groups on the oral mirror substrate. Preferably, the siloxane with end-reactive groups is selected from at least one of low molecular weight chlorosilane double-end silane monomers (such as dichlorodimethylsilane, 1,3-dichlorotetramethyldisiloxane, and dimethoxydimethylsilane, etc.) or high molecular weight single-end siloxanes (such as trimethoxy-capped polysiloxane or vinyl-end polysiloxane, etc.). Preferably, the weight average molecular weight of the high molecular weight single-end siloxane is 1000 - 100000. Preferably, the thickness of the coating is 1 - 10 nm, preferably 3 - 10 nm.

4. The mouth mirror according to any one of claims 1 to 3, characterized in that, The oral mirror is prepared by grafting siloxanes with end-reactive groups on the oral mirror substrate to form a polysiloxane coating.

5. The mouth mirror according to claim 4, characterized in that, The grafting method is: coating a solution containing siloxanes with end-reactive groups on the oral mirror substrate. Preferably, the coating method can be brushing or wiping. Exemplarily, a brush, non-woven fabric or lens cleaning paper is soaked in a solution of siloxanes with end-reactive groups, and then the surface of the oral mirror substrate is wiped with the brush, non-woven fabric or lens cleaning paper. Preferably, the concentration of the siloxane with end-reactive groups in the solution is 0.5 - 20 wt%.

6. The mouth mirror according to claim 4, characterized in that, The solution may further contain an acid catalyst. For example, the acid catalyst includes molecules that can generate hydrogen ions, such as at least one of hydrochloric acid, Lewis acid, and chlorosilane. Preferably, the acid catalyst can be the same as the siloxane with end-reactive groups. For example, the acid catalyst can be dichlorodimethylsilane, 1,3-dichlorotetramethyldisiloxane. Preferably, the concentration of the acid catalyst in the solution is 0.1 - 5 wt%. Preferably, the solvent used in the solution is at least one of isopropyl alcohol, ethanol, and ethylene glycol, etc.

7. The preparation method of the mouth mirror according to any one of claims 1-6, characterized in that, The preparation method includes modifying a solution containing siloxanes with end-reactive groups on the oral mirror substrate to prepare an oral mirror with a polysiloxane coating modified on its surface.

8. The preparation method according to claim 7, characterized in that, The modification method can be coating. Also, for example, the coating method can be brushing or wiping. Preferably, a brush, non-woven fabric or lens cleaning paper is soaked in a solution of siloxanes with end-reactive groups, and then the surface of the oral mirror substrate is wiped with the brush, non-woven fabric or lens cleaning paper. Also, for example, the wiping time can be 15 - 120 s.

9. The preparation method according to claim 7, characterized in that, The solvent used in the solution is a low-toxic organic solvent, such as at least one of isopropyl alcohol, ethanol, and ethylene glycol, etc. Preferably, the concentration of the siloxane with end-reactive groups in the solution is 0.5 - 20 wt%.

10. The preparation method according to any one of claims 7-9, characterized in that, The solution may further contain an acid catalyst. For example, the acid catalyst includes molecules that can generate hydrogen ions, such as at least one of hydrochloric acid, Lewis acid, and chlorosilane. Preferably, the acid catalyst may be the same as the siloxane having a terminal reactive group. For example, the acid catalyst may be dichlorodimethylsilane, 1,3-dichlorotetramethyldisiloxane. Preferably, the concentration of the acid catalyst in the solution is 0.1 to 20 wt%.

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